geosped
100 W
- Joined
- Mar 18, 2015
- Messages
- 258
So I'm not new to e-bikes. I built a really cool off road mountain bike that I used for years. BMC Rear hub on 50v made well over 1000w and had plenty of power. Actually with all the weight including the battery on the rear tire it was very sketchy at times. All I do is just ride for fun and exercise off road on mountain bike trails. So I want a new mid-drive but how do I size the right one?
1) Strictly off road mountain biking trails.
2) 250lbs
3) Trails are I ride have some really steep sections with lots of big thick roots. Not uncommon where I have to get off and walk around it.
4) lots of tight single track with lots of switch backs. Very slow and challenging especially when going up hill.
I'm using a 26" full suspension bike. Now the big question is how much power do I need? There are several great mid drives out there. All of the commercial hard core mountain bikes ($3500) and up seem to use a much lower power system and much smaller batteries that what I'm seeing. Tenshong and Bfang offer 500w 750w 1000w on 48v and 750w 1200w 1500w on 52v batteries respectively. Assuming the controller is setup to take the higher voltage batteries. So how do I make sure I get a system strong enough to carry me up the hill with out burning anything out and at the same time not too powerful where it's dangerous? Do I really need 1500w to get me up a steep hill?
Thoughts and suggestions.
Green bike is what I used to ride. This hub motor easily made 1200w but like I said it was very sketchy the way I had the battery pack mounted. Not ideal at all. In the end I burned out the halls sensors and decided to go in another direction.
Blue bike is the new donor bike. Just need help in deciding to go to the 750w 48v - 1200w 52v BBSH02 option OR should I go with the BBSHD 1000w 48v - 1500w 52v option?
1) Strictly off road mountain biking trails.
2) 250lbs
3) Trails are I ride have some really steep sections with lots of big thick roots. Not uncommon where I have to get off and walk around it.
4) lots of tight single track with lots of switch backs. Very slow and challenging especially when going up hill.
I'm using a 26" full suspension bike. Now the big question is how much power do I need? There are several great mid drives out there. All of the commercial hard core mountain bikes ($3500) and up seem to use a much lower power system and much smaller batteries that what I'm seeing. Tenshong and Bfang offer 500w 750w 1000w on 48v and 750w 1200w 1500w on 52v batteries respectively. Assuming the controller is setup to take the higher voltage batteries. So how do I make sure I get a system strong enough to carry me up the hill with out burning anything out and at the same time not too powerful where it's dangerous? Do I really need 1500w to get me up a steep hill?
Thoughts and suggestions.
Green bike is what I used to ride. This hub motor easily made 1200w but like I said it was very sketchy the way I had the battery pack mounted. Not ideal at all. In the end I burned out the halls sensors and decided to go in another direction.
Blue bike is the new donor bike. Just need help in deciding to go to the 750w 48v - 1200w 52v BBSH02 option OR should I go with the BBSHD 1000w 48v - 1500w 52v option?